How does Nano banana pricing work?

Credit-based: 1 credit equals $0.001 USD. The default `gemini-2.5-flash-image-preview` model id costs 15 credits per image; the `-official` model id costs 36 credits. Multiplier is the n parameter (1 to 4 images per requestreAPI four-image draft on the default id runs 58 credits total. No hidden fees on either Nano banana model id and no monthly platform fee.

What's the difference between the two Nano banana model ids?

The default `gemini-2.5-flash-image-preview` routes through reApi's optimized path and is the cheapest way to call Nano banana. The `-official` variant routes directly to Google's endpoint at a higher per-image cost — useful when you need the official routing guarantee for compliance or A/B comparison. Both share the same parameter shape.

Can Nano banana edit existing images?

Yes. Pass URLs in image_urls and Nano banana switches to image-to-image. Up to 14 reference images feed into a single call — combine subject references, style references, and scene references in one prompt. URLs must be public HTTPS (no base64 or data: URIs); upload to your own R2 / S3 / OSS first and pass the public URL.

What aspect ratios does Nano banana support?

Nano banana accepts ten aspect ratios via the size field: 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, and 21:9. For extreme banner ratios like 1:8 or 8:1 use Nano banana 2 (gemini-3.1-flash-image-preview) instead — same reApi key, same endpoint, just a different model id.

How many images can Nano banana generate per call?

1 to 4 images per request via the n parameter. The default n is 1. Each image is billed independently — n=4 on the default Nano banana id costs 58 credits, n=4 on the `-official` id costs 144 credits. Failed and moderated calls are not charged.

How fast is Nano banana?

Most Nano banana calls finish in 5 to 20 seconds at 1K. The playground on this page streams live status while a task runs, and the same status is exposed on /api/v1/tasks/:id so you can wire a progress bar into your own app. For higher-fidelity output at 2K or 4K, switch to Nano banana Pro (gemini-3-pro-image-preview).

Where is the full Nano banana API reference?

The complete parameter list, validation rules, error codes, and runnable examples for Nano banana live at /docs/gemini-2-5-flash-image-preview. Both model ids share the same endpoint shape — only the model field differs — so a single integration covers both Nano banana variants without a refactor.

Nano banana API — Gemini 2.5 Flash Image, One Endpoint

Nano banana is the community name for Google's Gemini 2.5 Flash Image. Generate and edit images through reApi's OpenAI-compatible endpoint — Nano banana ships to production in minutes, not days.

Model type:

Price

est$0.015– $0.015per image

Per-call billing — the cheapest way to call Nano banana.

Same API endpoint. The model parameter selects the variant.

Try Nano banana View API Docs

01playground

InputsPOST /api/v1/images/generations

Prompt*

Free text · required · ≤ 1000 chars

Provide a prompt or at least one reference image / video / frame.

Size

Ten ratios from 1:1 to 21:9

Resolution

Nano banana renders at 1K only

Count

1–4 images per request

Reference images

Drag images here or click to upload

Up to 14 · public HTTPS URLs only

Outputidle

try one of these prompts

02use cases

What you can build

Real workflows powered by this model.

Product photo refresh generated with Nano banana

01/case

Refresh product photos in batches with Nano banana

Edit existing e-commerce shots without a reshoot. Pass the original URL in image_urls, describe the change in plain English, and Nano banana returns an updated render that keeps the product geometry intact while the surrounding scene gets reworked. Run a hundred SKUs through the same prompt template and the catalog stays visually consistent — same lighting language, same background style, every variant on brand.

Edit a photo

Ad creative variations generated by Nano banana

02/case

Generate ad creative drafts in seconds

Spin four hero variants from a single prompt with n=4 and pick the winner before stand-up ends. The default Nano banana id is tuned for speed and cheap drafts; switch to `gemini-2.5-flash-image-preview-official` when an investor deck or paid placement needs the higher-fidelity render. Same endpoint, same JSON body — only the model id changes between drafts and reAPIs.

Reference-driven composition with Nano banana

03/case

Fuse references into one composition

Pass up to 14 reference images and describe how they should combine. Nano banana handles subject + scene + style references in a single call — drop a product photo plus a moodboard frame plus a brand palette swatch and the model fuses them into a new on-brand shot. No mask file, no separate compositing step. Public HTTPS URLs only — upload to your own R2 / S3 / OSS first.

03pricing

Pricing

Credit-based — 1 credit = $0.001 USD. Pay only for completed generations.

Mode	Category	Unit	Price
Default
└	1K	1 image	$0.015 15 credits
Official Google
└	1K	1 image	$0.036 36 credits

05why

Why reAPI

One key, one endpoint, two model ids

Send model `gemini-2.5-flash-image-preview` for the default Nano banana, or `gemini-2.5-flash-image-preview-official` for Google's official endpoint. Either id hits the same `/api/v1/images/generations` route — switch by changing one string in the request body. No second SDK, no second key, no separate billing surface to wire up. Nano banana behaves like any other reApi model from your code's point of view.

Credits in, image out — no surprises

Pricing is inreAPI credits where 1 credit equals $0.001 USD. The estimator on this page costs your exact configuration before submit, so the Nano banana charge in the dashboard matches what the playground showed. No metering surprises, no minimum commitment, no monthly platform fee — only what your app actually generates with Nano banana, billed per image.

Async-first, drop-in compatible

Submit a Nano banana task, get a task_id back instantly, poll until the result lands. Serverless functions, queue workers, edge runtimes — wherever you run, the async pattern fits. Failed and moderated requests are not charged, so a flaky prompt never costs you credits. The same lifecycle covers every reApi model — Nano banana plugs into your existing task plumbing.

06quickstart

Integrate Nano banana in three steps

step 01
Create an API key
Sign up at reApi and grab a key from the dashboard. Free signup credits cover the first hundred-plus Nano banana generations, enough to ship the first feature and watch the bill stay at zero while you iterate.
Open
step 02
Submit a generation
POST to /api/v1/images/generations with model: gemini-2.5-flash-image-preview and a prompt. Add size, n, or image_urls as you need — the gateway validates every field before charging. Nano banana returns a task_id immediately so the request never blocks your handler.
Open
step 03
Poll the result
GET /api/v1/tasks/:id until status is completed. The Nano banana response carries image URLs on our CDN, stable for 24 hours — copy them to your own storage if you need them longer than that.
Open

07faq

Frequently asked questions

Common questions about this model.

Nano banana is the community nickname for Google's Gemini 2.5 Flash Image (formal id: gemini-2.5-flash-image-preview). It is a fast text-to-image and image-to-image model that renders at 1K with up to 14 reference images per call. reApi exposes Nano banana through one OpenAI-compatible endpoint with credit-based pricing, so you skip the upstream billing surface and call the same underlying model your evaluation work used.

09api reference

docs/api/gemini-2-5-flash-image-preview

API reference

Drop-in code and the full parameter table.

View full reference

POST /api/v1/images/generations
Authorization: Bearer $REAPI_API_KEY
Content-Type: application/json

{
  "prompt": "..."
}

start building

Ready to ship?

Try it in the playground or grab an API key to integrate now.

Try Nano banana Get API key

What you can build

Real workflows powered by this model.

01/case